10926.vlf法預(yù)報(bào)地磁暴的研究_第1頁
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1、FORECASTONGEOⅣ【AGNETICSTROMSWITHTHEVLFM哐THODADissertationSubmittedtotheGraduateSchoolofHenanNormalUniversityinPartialFulfillmentoftheRequirementsfortheDegreeofMasterofEngineeringScienceByLiDandanSupervisor：ProfNiuYoutian

2、May2015ABSTRACTSunisthecentralbodyofthesolarsystem，theonlystarandglowingobjectsinthesolarsystemitsactivitiesimpactonthetheplanetaroundinevitablelyThispaperaimsatstudyingtheXrays，ultravioletrays，highenergyparticlesetcwhen

3、solarflaresburstrelativelystronginsolarcyclethechargedhighenergyparticleswoulddisturbtheEaah’SmagneticfieldWhentheyreachthevicinityoftheEarththatisthegeomagneticstormHumansneedtodevelopmorerealisticandreliableforecasting

4、systemsinordertoreducedamagesofelectricalequipment，communicationalequipmentandoilpipelinesbygeomagneticstorms，providingvaluabletimetotakemeasuresⅥ一Fsignalsarestableanddecreasingslowly，etc，andthephaseissensitivetotheexter

5、nalenvironmentXraysflowsuddenlyincreasedfirstteachtheionosphereatthespeedoflightwhensolarflaresburst，promotingthedeepeningdegreeofionizationoftheionosphere，ionosphericelectrondensityincreasingandtheequivalentheightreduct

6、ionItwillinevitablyleadtoVLFsignalsphaseadvancedWhilethehighenergypattie1esatrelativelyslowpacerequire13daysteachthevicinityoftheEarth，disturbancingtheEarth’SmagneticfieldthatisgeomagneticstormsdisturbanceLargeamountofda

7、tadetectionfoundthatthebiggerVLFsignalphaseadvancevalue，thehigherlevelsolarflareswillbe，WhichwilllikelytotriggergeomagneticstormsItmayadvance13daystonoticewhethertheremayoccurageomagneticstormbyinvertingthelevelofsolarfl

8、aresThemaincontentofthisarticleisbasedontheobservedvaluesaheadof119kHzVLFsignalsfromthemainstation，westdeputystationandtheEastdeputystationinXinxiang，accordingtotheformula，wecancalculatetheionosphericequivalentheightdrop

9、heightatthistimeWeCallfindthefitfunctionbetweenthevaluesofionosphericequivalentheightandX—rayfluxrecordedbytheGOESinUS，whichisclosesttothemeasuredvaluesWeCallcalculateanyflowvaluesofobservedsolaractivityaccordingtothefit

10、tingequationandantishowthelevelofsolarflaresaccordingtosolarflaresclassifiedatthistime，thegreaterlevelthegreaterimpactontheplanetwillbeWefoundthattheforecastingdataisclosetodatarecordedontheGOESsatellitebyverifiedthemeas

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